Alarm.



, PATENTED MAR. 2o, 1906. H. v1R WIN ALARM. APPLICATION FILED DEQ.9,1904.

` 2 SHEETS-SHEET 1.

PATENTED MAR. 20, 1906.

H. IRWIN.

ALARM. lAPPLIOATION 'H LED p1:c 9.19o4.

2 SHEETS-SHEET 2.

win

WITNESSES:

explosive. of the escapement and its o erating mechanlel to the portion11.

. UNITED sTArEs PATENT. oEEroE.l Y

HAEoLD'InWmoE HAwKEs BAY, NEW ZEALAND.

'ALARNL vApplication filed December 9, 1904. Serial No. 236,127.

To a/ZZ whom it may concern: Be it known that I, HAROLD IRWIN, a subject Vof the King of Great Britain, and-a resident of Fern Hill, HawkesBay, New Zealand, have invented a new and Improved Alarm, of which thefollowing is a full, clear, and exact description.

My invention relates to alarms, and more particularly to those adaptedto serve as scarecrows., lts principal object is to provide an efficientap aratus of this character by which a series o explosions may beproduced at denite intervals for the purpose of frightening birds oranimals away from trees, cro s,`and thelike. V

eference is to bey had to the accompanying drawings, forming a part ofthis speciiication, in which similar characters of reference indicatecorresponding parts in all the views. v Figure lis a perspective view ofone embodiment of my invention set in` place in the field. Fig. 2 is avertical longitudinal section through the hoodWith parts of themechanism broken away. Fig. 3 is a central vertical transverse section;Fig. 4 is an enlarged detail of the ignition device. Fig. 5 shows one ofthe holders for sup orting the Fig. 6 is a detail in side elevation ism,and Fig. 7 is a sectionadetail showing a water-jacket surrounding thecandle-socket.

F designates a frame, which is here shown as including a portion 11, inwhich are openings to receive bolts 12 for the pur ose of fastening theapparatus to a post or other suitable support. The frame above the por--tion 11 is offset at 13,furnishing a portion 14,

which preferably extends substantially paral- It is then bent atsubstantiallyright angles to furnishan arm 15 and again bent downwardly,forming a depending portion 16, which maybe approximately'parallel tothe portion 14. Mounted upon the frame is a support for the explosive,which may consist-of a Wheel comprising a disk 16a, at one side of whichis secured a rim 17. This wheel is preferably fixed upon a journal 18,rotatable in alined bearings 1n the portions 14 and 16 of the frame.Thewheel carries holders, which may be formed -of trough-shaped pieces19, soldered or other- Wise secured tothe rim and separated by intervalswhich are preferably equal to the width between the arms of the troughs,so that they are adapted to receive explosive members of equaldiameter-such, for ex- Specication of Letters Patent.

. Patented March 20, 1906.

ample, as fire-crackers-which are indicated at F. Oneend of each crackeris engaged by a sharpened projection 21, secured at the end of 'theholders upon a flange 22, which is of considerable width and shown asextending from the opposite edgeof the rim from that which is secured tothe disk. The fuses f of the crackers preferably extend through openings23 in this flange 22, while at the opposite end are springs 24, fixed attheir outer endsl to a iiange or extension 25 from the disk 16a, thesesprings serving to force, the crackers into firm engagement with theproj ections and prevent their being disengaged by the explosions.

The wheel may be rotated by a spring 26, the inner end of whichissecured to the journal 18, while the outer end is attached to a in 27,mounted upon the portion 14 of the iiame. The rotation of the wheelunder the inuence of the spring is preferablyV controlled by anescapement, which may consist.

of a pallet 29, pivoted at 30 upon the arm 16 of the frame and havingprojections 31 and ranged in a circular series about the disk. Thepallet is shown as provided with a weight 34, which normally holds theproj ections in proximity tothe pins, the downward movementA beinglimited by an extension 35 from the projection 31, which rests upon theouter surfaces of said pins. The escapement maybe operated by a camwheel or member 36, having teeth 37, here shown as three in number andarranged at equal angles, this wheel bein fixed upon the outer extremityof avspind e 38 vof suitable clockwork, which is inclosed by acase 39.The teeth may coperate with an arm 39ab of the pallet.

4Situated just below the wheel, at one side be obvious that any iiame orsufficientlyheated substance, such as a lamp or hot wire, might beemployed. The holder as illustrated has a cover 45, conveniently securedin place IIO by a bayonet-joint 46, and at its center an l opening '47,throughwhich the wick of the candle may project. At the lower end of thesocket is a spiral spring 48, which serves to maintain the candle at aconstant height or always in contact with the cover. As shown in Fig. 7of the drawings, the socket may be surrounded by a water-jacket 49,which will prevent the Wax of the candle from melting under highatmospheric temperatures. In

the cover of the box is a series`of air-holes 50, and at one side of thesocket is an opening 51 to give the flame access to the fuses. Above theopening is preferably located an inclined wall 52, which directs theflame toward the wheel, this arrangement causing the soot which mayaccumulate to fall at one side of the flame, thus avoiding itsextinguishment. A guard-wall 53, rising from the cover of the box, maybe interposed between the opening and the wheel.

The apparatus may be covered by a hood 54, held in the correct verticalposition by a contact-piece 55 and by a guide 56, which engages theportion 14 of the frame. The hood may be secured upon the frame by asetscrew 57.

In the use of the apparatus the proper tension is applied Lto the spring26 by holding the pallet out of engagement with the pins and rotatingthe wheel in the direction opposite to that indicated by the arrow inFig. 2. The clockwork is also wound and the holders are then suppliedwith fire-crackers of suitable size, with their fuses projecting throughthe openings in the flange. The candle or other igniting member is thenlighted and. the apparatus set up in place and covered by its ood. Theinclosure of the candle within the box allows only the access of sucientair to support combustion and renders it impossible for it to beextinguished by the wind.

The rotation of the cam wheel or member 36 will now move the escapementat regular intervals, permitting the wheel to advance under theinfluence of the spring by an amount equal to' the space between thepins. This brings one of the fire-cracker fuses over the flame, whichignites it, and an explosion follows, giving sufiicient sound to beeffectual in frightening birds and animals from the crop to beprotected. After a suitable interval the succeeding tooth acts and asecond fire-cracker is brought over the flame and exploded, thiscontinuing until the charge upon the wheel is exhausted, when it may berenewed and the operation continued as before.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The combination with a wheel provided with holdersadapted to receive fire-crackers, of means for rotating the wheel, anescapement cooperating with said wheel, means for operating theescapement, and a holder having flame-producing means situated inproximity to the wheel for coperation with the fire-crackers. I

2. The combination with a wheel provided with holders adapted to receivefire-crackers, of means for rotating the Wheel, an escapement coperatingwitth said wheel, clock-work operating upon the escapement, and a holderhaving flame-producing means situated in proximity to the wheel forcooperation with the fire-crackers.

3. The combination with a wheel provided with holders adapted toseparably receive fire-crackers and having a wall at one end of saidholders provided with openings through which the fire-cracker fuses maypass, of an ignition device situated outside the wall and adjacent tothe opening.

4. The combination with a movable support Iprovided with a holder, ofengaging means situated at one end of the holder, an a spring situatedat the opposite end.

5. The combination with a support for an explosive, of an ignitiondevice comprisiln7 a box provided with an opening and a holder havingflame-producing means situated beneath and at one sideof the opening.

6. Thev combination with a support for an explosive, of an ignitiondevice comprising a box provided with an opening above which is a Wallinclined toward the support, and a holder having flame-producing meanssituated beneath and at one side of the opening.

In testimony whereof I have signed my name to thisY specification in thepresenceof two subscribing witnesses.

HAROLD IRWIN.

Witnesses:

H. HUMPHRrEs, A. S. G. CARLSON.

